<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button
            type="primary"
            @click="addDialogVisible=true"
          >添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table
        :data="roleList"
        border
        stripe
      >
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom',i1===0 ? 'bdtop' : '','vcenter']"
              v-for="(item1,i1) in 
                scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row,item1.id)"
                >
                  {{item1.authName}}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row
                  :class="[i2===0 ? '' : 'bdtop','vcenter']"
                  v-for="(item2,i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row,item2.id)"
                    >{{item2.authName}}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3,i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row,item3.id)"
                    >{{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>
                    {{scope.row}}
                </pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column
          label="角色名称"
          prop="roleName"
        >
        </el-table-column>
        <el-table-column
          label="角色描述"
          prop="roleDesc"
        >
        </el-table-column>
        <el-table-column
          label="操作"
          width="300px"
        >
          <template slot-scope="scope">
            <!-- 修改按钮 -->
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
            >编辑</el-button>
            <!-- 删除按钮 -->
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeUserById(scope.row.id)"
            >删除</el-button>
            <!-- 分配角色按钮 -->
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
            >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加用户的对话框 -->
    <el-dialog
      title="添加用户"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="80px"
      >
        <el-form-item
          label="角色名称"
          prop="roleName"
        >
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item
          label="角色描述"
          prop="roleDesc"
        >
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span
        slot="footer"
        class="dialog-footer"
      >
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="addUser"
        >确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改用户的对话框 -->
    <el-dialog
      title="修改用户"
      :visible.sync="editDialogVisible"
      width="50%"
      @closed="editDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="80px"
      >
        <el-form-item
          label="角色名称"
          prop="roleName"
        >
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item
          label="角色描述"
          prop="roleDesc"
        >
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span
        slot="footer"
        class="dialog-footer"
      >
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="editUserInfo"
        >确 定</el-button>
      </span>
    </el-dialog>

    

    <!-- 分配角色的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%" @close="setRightDialogClosed"
    >
      <!--  -->
      <!-- 树形控件 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span
        slot="footer"
        class="dialog-footer"
      >
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="allotRights"
        >确 定</el-button>
      </span>
    </el-dialog>
    
    
  </div>
</template>

<script>
export default {
    data(){
        return {
            // 所有角色列表数据
            roleList:[],
            // 控制分配角色对话框的显示与隐藏
            setRightDialogVisible:false,
            //所有权限的数据
            rightsList:[],
            // 控制添加用户对话框的显示与隐藏
            addDialogVisible:false,
            //添加用户的表单数据
            addForm:{
                roleName:'',
                roleDesc:''
            },
            // 添加表单的验证规则对象
            addFormRules:{
                roleName:[
                    {required:true,message:'请输入角色名称',
                    trigger:'blur'},
                    {min:2,max:10,message:
                    '角色名的长度在2~10个字符之间',
                    trigger:'blur'}
                ],
                roleDesc:[
                    {required:true,message:'请输入角色描述',
                    trigger:'blur'},
                    {min:2,max:20,message:
                    '角色描述的长度在2~20个字符之间',
                    trigger:'blur'}
                ]
            },
            // 控制修改用户对话框的显示与隐藏
            editDialogVisible:false,
            // 查询到的用户信息对象
            editForm:{},
            // 修改表单的验证规则对象
            editFormRules:{
                roleName:[
                    {required:true,message:'请输入角色名称',
                    trigger:'blur'}
                ],
                roleDesc:[
                    {required:true,message:'请输入角色描述',
                    trigger:'blur'}
                ]
            },
            // 树形控件的属性绑定对象
            treeProps:{
              label:'authName',
              children:'children'
            },
            // 默认选中的节点id
            defKeys:[],
            // 当前即将分配角色的iD
            roleId:''
        }
    },
    created(){
        this.getRolesList()
    },
    methods:{
        // 获取所有角色的列表
        async getRolesList(){
            const {data:res}=await this.$http.get('roles')

            if(res.meta.status !==200){
                return this.$message.error('获取角色列表失败！')
            }

            this.roleList = res.data

            //console.log(this.roleList)
        },
        // 监听添加用户对话框的关闭事件
        addDialogClosed(){
            this.$refs.addFormRef.resetFields()
        },
        //点击按钮，添加新用户
        addUser(){
            this.$refs.addFormRef.validate(async valid=>{
                if(!valid) return
                // 可以发起添加用户的网络请求
                const {data:res}=await this.$http.post
                ('roles',this.addForm)

                if(res.meta.status!==201){
                    this.$message.error('添加用户失败！')
                }

                this.$message.success('添加用户成功！')
                // 隐藏添加用户的对话框
                this.addDialogVisible = false
                // 
                this.getRolesList()
            })
        },
        // 展示编辑用户的对话框
        async showEditDialog(id){
            const {data:res}=await this.$http.get
            ('roles/' + id)

            if(res.meta.status!==200){
                return this.$message.error('查询用户信息失败！')
            }

            this.editForm = res.data
            this.editDialogVisible = true
        },
        //监听修改用户对话框的关闭事件
        editDialogClosed(){
            this.$refs.editFormRef.resetFields()
        },
        editUserInfo(){
          this.$refs.editFormRef.validate(async valid =>{
            if(!valid) return
            // 发起修改用户信息的数据请求
            // 此ID非彼id，之后要注意
            const {data:res} = await this.$http.put('roles/' + this.editForm.roleId,
            {
                roleName:this.editForm.roleName,
                roleDesc:this.editForm.roleDesc
                })
              if(res.meta.status!==200){
            return this.$message.error('更新用户信息失败！')
          }

          //关闭对话框
          this.editDialogVisible=false
          // 刷新数据列表
          this.getRolesList()
          // 提示修改成功
          this.$message.success('更新用户信息成功！')
          })

          
        },
        //根据id删除对应的用户信息
        async removeUserById(id){
            //弹框询问用户是否删除
            const confirmResult=await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
        }
        ).catch(err=>err)

        //如果用户确认删除，那么返回值为字符串 confirm
        //如果用户取消删除，那么返回值为字符串 cancel
        console.log(confirmResult)
        if(confirmResult!=='confirm'){
            return this.$message.info('已经取消删除')
        }

        const {data: res}=await this.$http.delete('roles/' + id)

        if(res.meta.status!==200){
            return this.$message.error('删除用户失败！')
        }

        this.$message.success('删除用户成功！')
        this.getRolesList()
        },
        // 根据id删除对应的权限
        async removeRightById(role,rightId){
            // 弹框提示用户是否要删除
            const confirmResult = await this.$confirm
            ('此操作将永久删除该权限, 是否继续?', '提示', 
            {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
            }
            ).catch(err=>err)

        if(confirmResult!== 'confirm'){
            return this.$message.info('取消了删除')
        }

        //console.log('确认了删除')

        const {data:res}=await this.$http.delete
        (`roles/${role.id}/rights/${rightId}`)

        if(res.meta.status!==200){
            return this.$message.error('删除权限失败！')
        }

        role.children = res.data//数据的双向绑定
        },
        //展示分配权限的对话框
        async showSetRightDialog(role){
          this.roleId=role.id
            // 获取所有权限的数据
            const {data:res}=await this.$http.get('rights/tree')

            if(res.meta.status!==200){
                return this.$message.error('获取权限数据失败！')
            }

            // 把获取到的权限数据保存到data中
            this.rightsList=res.data
            console.log(this.rightsList)

            // 递归获取三级节点的Id
            this.getLeafKeys(role, this.defKeys)

            this.setRightDialogVisible = true
        },
        // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
        getLeafKeys(node, arr) {
        // 如果当前 node 节点不包含 children 属性，则是三级节点
        if (!node.children) {
          return arr.push(node.id)
        }

        node.children.forEach( item => this.getLeafKeys(item, arr))
      },
      // 监听分配权限对话框的关闭事件
      setRightDialogClosed(){
        this.defKeys=[]
      },
      // 点击为角色分配权限
      async allotRights(){
        const keys =[
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        const idStr = keys.join(',')

        const {data:res}=await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})

        if(res.meta.status!==200){
          return this.$message.error('分配权限失败！')
        }

        this.$message.success('分配权限成功！')

        this.getRolesList()
        this.setRightDialogVisible=false
      }
    }
}
</script>

<style lang="less" scoped>
.el-tag{
    margin:7px;
}

.bdtop{
    border-top:1px solid #eee;
}

.bdbottom{
    border-bottom: 1px solid #eee;
}

.vcenter{
    display:flex;
    align-items:center;
}
</style>